Pair of skis



Feb. 14, 1967 w. c. CARLTON PAIR OF SKIS Filed Jan. 6, 1965 FIG. 2.

United States G 3,304,095 PAIR OF SKIS William Charles Carlton, Fitches,Finchingfield, England Filed Jan. 6, 1965, Ser. No. 423,766 4 Claims.(Cl. 2801l.13)

A difiiculty in skiing concerns holiday-makers who do not spendsuflicient time skiing each year to strengthen the muscles necessary toenable them to take some ad vantage of modern skiing techniques. Thisdifficulty is particularly noticeable when the skier becomes tired. Itis the object of this invention to alleviate this difiiculty to someextent.

In the following specification and claims the word horizontal means theline upon which a cross section through a pair of skis would rest whenthe skis are in a normal position on level ground.

Skis made according to the known art are substantially similar for boththe left and right foot, with the exception of the bindings, and eachski is also substantially symmetrical about its length. In the presentinvention, each ski is not symmetrical and the left ski is the oppositeto or a mirror image of the right ski, so that the invention concerns apair of skis as distinct from a single ski. This invention is notconcerned with the ski bindings.

For the sake of brevity, in the following description of the manner inwhich the invention may be achieved, detailed reference is made only tothe right ski, it being understood that the left ski is made in theopposite sense, that is, the left ski in transverse section is a mirrorimage of the right ski.

In order that this invention may be clearly understood and followed,examples will now be described with reference to the accompanyingdrawings, in which:

FIGURE 1 is a perspective view from the underside of a pair of skisembodying the invention.

FIGURE 2 is an enlarged cross section on line 22 of FIGURE 1.

FIGURE 3 is an enlarged cross section on line 33 of FIGURE 1, showing adevelopment of the invention.

Referring now to FIGURES l, 2 and 3, it will be seen that apart from thecross sections the main form of the skis is in the known manner, beingcurved upwards at the front end and very slightly arched intermediatethe ends. As the view of the skis in FIGURE 1 is from underneath, theski on the left in FIGURE 1 represents the right ski and the ski on theright in FIGURE 1 represents the left ski.

In FIGURE 2 the view is looking forward and therefore the ski on theleft is the ski for the left foot and the ski on the right is the skifor the right foot.

In FIGURE 3 the view is also looking forward and therefore the ski onthe left is the ski for the left foot and the ski on the right is theski for the right foot.

Referring now to FIGURE 2, it will be seen that the inside lower edge Gis sharp and this sharpness is maintained with a steel edge. Adjacentthe lower edge G is the under-surface A which is made so that it isinclined transversely upwards from the horizontal at an angle designatedB, this angle being between 2 and Adjacent the end of the under-surfaceA which is remote from the sharp inside edge G is a further undersurfaceC which is inclined downwards from the point of intersection withunder-surface A at an angle to the horizontal designated D which isbetween 90 and 45 Adjacent under-surface C, but remote fromunder-surface A, is a further under-surface E which is inclined upwardsfrom the horizontal at an angle designated P which is between 2 and 10.The section fades out as it reaches the curve in the ski forward and maycontinue throughout the length of the ski. Alternatively, the sec-3,304,095 Fatented Feb. 14, 1967 tion may blend into another sectionabout one third of the length from the forward end of the ski.

The ski for the left foot is shown in FIGURE 2 at G1, B1, A1, D1, C1, B1and F1, being made exactly in the opposite sense to the ski describedfor the right foot.

A further development of the invention is now described with referenceto FIGURES 2 and 3 and again referring to the ski for the right foot,the section at FIG- URE 2 is blended or merges into the section shown inFIGURE 3 at about one third the length of the ski from the forward end.As shown on the drawing the section at FIGURE 3 has a sharp inside loweredge at G2 and adjacent the lower edge G2 is under-surface A2 which ismade so that it is inclined upwards from the horizontal at an angle B2,this angle being between 2 and 10 and preferably the same angle as angleB in FIGURE 2.

Adjacent the end of the under-surface A2, which is remote from the sharplower inside edge G2, is a further under-surface C2 which is inclineddownwards from the point of intersection with under-surface A2 at anangle D2 to the horizontal which is between and 45 and preferably thesame angle as angle D in FIGURE 2. Adjacent under-surface C2, but remotefrom under-surface A2, is a further under-surface E2 which is betweenhorizontal and an angle F2 which may be up to 10.

The ski for the left foot is shown in FIGURE 3 at G3, B3, A3, D3, C3, E3and F3 and is made exactly in the opposite sense to the ski describedfor the right foot.

It will be understood that throughout this specification the jointsbetween the surfaces A, C and E may be slightly radiused rather thansharp, and, moreover, if the development of the invention is used inwhich two different sections are used to form the under-surface of theski, the sections must be blended in such a way that the grooves formedon the under-side of the skis permit the skis to run straight and true.

What I claim is:

1. A pair of skis for a left and right foot, each ski having an insideedge, an outside edge, an upper surface and an under surface, a firstportion of each said under surface adjacent the inside edge beinginclined towards the upper surface from said inside edge at an angle offrom 2 to 10 to the horizontal when the ski is disposed on level ground,a second portion of said under surface adjacent said first portion beinginclined away from said upper surface and from said first portion at anangle of from 45 to 90 to the horizontal, and a third portion of saidunder surface between said second portion and the outside edge beinginclined towards said upper surface from said second portion at an angleof not more than 10 to the horizontal, the intersection between saidsecond and third portions of said under surface lying at a position from60% to 90% of the distance between the inside and outside edges measuredfrom said inside edge.

2. A pair of skis which are non-symmetrical, the ski for the left footbeing, in transverse section, a mirror image of the ski for the rightfoot; each ski being of greatest thickness, measured vertically, at itsinside edge and decreasing in vertical thickness transversely toward theoutside edge; said decrease in vertical thickness taking place on theunder surface only of the ski; the portion of said ski which is ofdecreasing thickness having its under surface at an angle relative tothe horizontal of between 2 and 10; there being a second under surfacewhich is very narrow and is inclined at an angle of between 90 and 45 tothe horizontal, this second under surface adjoining the first-mentionedportion of the under surface at the point where the ski is of leastvertical thickness; this second inclined under surface terminating at apoint Where the ski is of a thickness substantially equal to thethickness at its inside edge; and a third inclined under surfaceextending from the termination point of the sec- "ice 0nd inclined undersurface to the outside edge of the ski; References Cited by the Examinerthis third inclined under surface extending at an angle of FOREIGNPATENTS between 2 and 10 to the horizontal.

3. The invention defined in claim 2, wherein the junc- 458,498 8/1949Canadation of the second inclined under surface and the third 5112891117 2/1962 Franceinclined under surface lies between 60% and 90%of the 1,339,600 9/1963 a total width of the ski measured from theinside edge. 265,869 3/1950 swltzerland- 4. The invention defined inclaim 2, wherein each ski of the pair has a sharp outside lower edgeextending for BENJAMIN HERSH Pnmwy a substantialportion of its length,the under surface of 10 MILTON L. SMITH, Examiner. each ski adjacentthis outside lower edge being either horizontal or lying at an angle of10 to the horizontal.

1. A PAIR OF SKIS FOR A LEFT AND RIGHT FOOT, EACH SKI HAVING AN INSIDEEDGE, AN OUTSIDE EDGE, AN UPPER SURFACE AND AN UNDER SURFACE, A FIRSTPORTION OF EACH SAID UNDER SURFACE ADJACENT THE INSIDE EDGE BEINGINCLINED TOWARDS THE UPPER SURFACE FROM SAID INSIDE EDGE AT AN ANGLE OFFROM 2* TO 10* TO THE HORIZONTAL WHEN THE SKI IS DISPOSED ON LEVELGROUND, A SECOND PORTION OF SAID UNDER SURFACE ADJACENT SAID FIRSTPORTION BEING INCLINED AWAY FROM SAID UPPER SURFACE AND FROM SAID FIRSTPORTION AT AN ANGLE OF FROM 45* TO 90* TO THE HORIZONTAL, AND A THIRDPORTION OF SAID UNDER SURFACE BETWEEN SAID SECOND PORTION AND THE